Futtsu weather in August

In August, Futtsu sees average daytime highs of 27°C and overnight lows near 25°C, with 107 mm of rain across 9.8 wet days and about 13.3 hours of daylight. It is the 1st-warmest and 9th-wettest month of the year here.

Day-to-day highs hold fairly steady near 27°C through the month. The sky is clear or mostly clear about 34% of the time in August, and the air most often feels miserable.

Daylight stretches from about 13 h 48 min at the start of August to 12 h 48 min by month's end. Set against the rest of the year, August is Futtsu's 5th-clearest and 11th-windiest month. For the whole year in context, see Futtsu's year-round climate.

Daytime high
27°
1st warmest
Overnight low
25°
12th coldest
Rainfall
107 mm
9.8 wet days
Daylight
13 h 18 min
5:05 AM – 6:25 PM
Cloud cover
57%
5th clearest
Wind
17 km/h
11th windiest
Solar energy
5.15 kWh/m²
Travel score
6.5
out of 10

Futtsu is city in Chiba Prefecture, Japan.

Density
251/km²
people per km²
Founded
1971

Air quality: WHO Ambient Air Quality Database. Density & description: Wikidata (CC0), GeoNames.

Temperature in August

Average highAverage lowShaded bands: 10–90% of days

Day-to-day highs hold fairly steady near 27°C through the month.

A typical August day in Futtsu reaches about 27°C in the afternoon and slips back to 25°C overnight — a 2°C spread between the day's warmth and the night's chill. On most days the high lands between 25°C and 28°C. Set against its neighbours, August runs about 2°C warmer than July and about 2°C warmer than September.

20°23°25°28°30°151015202531
Avg high (°C)Avg low (°C)
12725
22725
32725
42725
52725
62725
72725
82725
92725
102725
112725
122725
132725
142725
152725
162725
172725
182725
192725
202725
212725
222725
232725
242725
252725
262725
272725
282724
292724
302724
312724

Futtsu weather by month

How August compares with the rest of the year at a glance. August is the 1st-warmest and 9th-wettest month here — the current month is highlighted below.

MonthHigh / Low (°C)Rainfall (mm)Wet daysSnow daysDaylight (hours)Travel score
Jan10° / 827.40.49.92.5
Feb10° / 838.50.710.72.4
Mar13° / 144130.211.73.3
Apr16° / 13°12611.6012.94.8
May19° / 17°13810.9013.86.0
Jun22° / 20°18212.9014.35.8
Jul25° / 23°14711.5014.16.4
Aug27° / 25°1079.8013.36.5
Sep25° / 22°18513.2012.26.2
Oct21° / 18°22212.7011.16.1
Nov17° / 13°11510.7010.15.3
Dec13° / 738.509.73.7

Cloud cover in August

ClearMostly clearPartly cloudyMostly cloudyOvercast

The sky is clear or mostly clear about 34% of the time in August.

Beyond those clear spells, partly cloudy skies cover about 15% of August, with mostly cloudy or overcast conditions the remaining 51%.

0%25%50%75%100%151015202531
Clearer (%)Cloudier (%)
14654
24654
34753
44852
54852
64852
74951
85050
94951
105050
115050
125050
135050
145050
155050
165149
175149
185050
195050
205050
215050
225050
235050
245050
254951
264951
274951
284852
294852
304951
314852

Chance of precipitation in August

Any precipitation

Futtsu gets around 107 mm of rain over 9.8 wet days in August. The line is the day-by-day chance of measurable precipitation.

Day to day, the chance of measurable rain averages around 32% and peaks near 37% on the wettest days. The odds climb toward the end of the month.

0%10%20%30%40%50%151015202531
Rain chance (%)
130
229
329
429
529
629
729
829
930
1030
1130
1231
1331
1432
1532
1632
1733
1833
1933
2033
2133
2234
2334
2434
2534
2635
2735
2836
2936
3037
3137

Humidity in August

DryComfortableHumidMuggyOppressiveMiserable

Most of August feels miserable — the stacked bands show each day's mix of comfort levels, read off the dew point.

By dew point, August lands in the miserable band about 45% of days. Sticky, muggy-or-worse air turns up on roughly 97% of them.

0%25%50%75%100%151015202531
Comfortable (%)Humid (%)Muggy (%)Oppressive (%)Miserable (%)
10284446
20284247
30284149
40284050
50284050
60283951
70283852
80283852
90283753
100293752
110293752
120293752
130293851
1402103850
1502103849
1602103948
1703103947
1813114046
1913114045
2013114144
2113124143
2213124242
2314134340
2414134339
2514144438
2614154536
2704164535
2804174634
2904184632
3004184731
3104194729

Wind in August

Winds average 17 km/h in August.

Across August, daily wind ranges from about 16 km/h on the calmest days to 17 km/h at its breeziest. It stays fairly steady from day to day.

05101520151015202531
Wind speed (km/h)Feels
116light breeze
216light breeze
316light breeze
416light breeze
516light breeze
617light breeze
717light breeze
817light breeze
917light breeze
1017light breeze
1117light breeze
1217light breeze
1317light breeze
1417light breeze
1517light breeze
1617light breeze
1717light breeze
1817light breeze
1917light breeze
2017light breeze
2117light breeze
2217light breeze
2317light breeze
2417light breeze
2517light breeze
2617light breeze
2717light breeze
2817light breeze
2917light breeze
3017light breeze
3117light breeze

Sunrise & sunset in August

DaylightNight

Daylight runs from about 13 h 48 min at the start of August to 12 h 48 min by month's end. The lit band spans sunrise to sunset each day.

Days shrink by about 60 minutes over August. Sunrise moves from 4:53 AM to 5:16 AM, and sunset from 6:41 PM to 6:05 PM.

12 AM4 AM8 AM12 PM4 PM8 PM12 AM151015202531
Daylight (h)Sunrise (AM)Sunset (PM)
113.84:536:41
213.84:546:40
313.74:546:39
413.74:556:38
513.74:566:37
613.74:576:36
713.64:576:35
813.64:586:34
913.64:596:33
1013.55:006:32
1113.55:016:31
1213.55:016:30
1313.45:026:29
1413.45:036:27
1513.45:046:26
1613.35:056:25
1713.35:056:24
1813.35:066:23
1913.25:076:21
2013.25:086:20
2113.25:086:19
2213.15:096:18
2313.15:106:16
2413.15:116:15
2513.05:126:14
2613.05:126:12
2713.05:136:11
2812.95:146:09
2912.95:156:08
3012.95:156:07
3112.85:166:05

Solar energy in August

Daily solar energy (kWh/m²)

Average shortwave solar energy reaching the ground each day in August, about 5.15 kWh/m².

For context, solar energy here swings from a low near 2.28 kWh/m² to a high of 5.25 kWh/m² in May across the year — August's 5.15 kWh/m² sits near the top of that range.

0246151015202531
Solar energy (kWh/m²)Level
15.4Bright
25.4Bright
35.4Bright
45.4Bright
55.4Bright
65.4Bright
75.4Bright
85.3Bright
95.3Bright
105.3Bright
115.3Bright
125.3Bright
135.2Bright
145.2Bright
155.2Bright
165.2Bright
175.1Bright
185.1Bright
195.1Bright
205.0Bright
215.0Bright
225.0Bright
234.9Bright
244.9Bright
254.9Bright
264.8Bright
274.8Bright
284.8Bright
294.7Bright
304.7Bright
314.6Bright
Planning a trip in August

Hazard calendar for Futtsu

In seasonPeak

In August, Futtsu sits inside its pacific typhoon season. The full year is below, with each hazard's peak months called out.

Futtsu sits in the Pacific typhoon belt; the season peaks July–October.

Pacific typhoon
Jan
Feb
Mar
Apr
May
Jun
Jul
Aug
Sep
Oct
Nov
Dec

Is August a good time to visit Futtsu?

Our two travel scores rate August for general sightseeing and for beach or pool weather — 0 (poor) to 10 (ideal).

6.5
Sightseeing
1st-best month of the year
6.6
Beach & pool
1st-best month of the year

August is a reasonable time to visit Futtsu for sightseeing. The water and warmth also suit a beach or pool day.

What to pack for Futtsu in August

From August's temperature range, rain chance, sun and wind — what's worth putting in the bag.

In August, Futtsu sees daytime highs around 27°C and nights near 25°C. Worth packing: light clothes, rain gear and sun protection. About 10 days see rain.

light clothesrain gearsun protection

Sea temperature near Futtsu in August

The nearest coast averages about 26°C in August — the other half of the beach question. The full-year curve and swim-comfort zones are below.

The sea offshore is warmest in August at about 26°C and coldest in February near 13°C.

It's comfortable for a long swim from Jun 5 to Nov 9 — about 5.2 months when the water holds above 20°C.

10°15°20°25°JanFebMarAprMayJunJulAugSepOctNovDecbracingcoolrefreshingwarmtropicalcomfortable to swim
Sea temperature (°C)Comfort
Jan15Bracing
Feb13Bracing
Mar14Bracing
Apr16Cool
May18Cool
Jun21Refreshing
Jul24Refreshing
Aug26Warm
Sep25Warm
Oct22Refreshing
Nov20Cool
Dec17Cool

UV index in Futtsu in August

LowModerateHighVery highExtreme

Clear-sky midday UV in August peaks around 10 (very high — sun protection essential). The full-year curve, shaded by WHO exposure level, is below.

Under clear skies, the midday UV index in Futtsu peaks around August 10 at about 10 (extreme) — sunscreen, a hat and midday shade are essential. It bottoms out near January 1 at about 2 (moderate).

The index reaches 3 or more — the level where the WHO recommends sun protection — in 10 months of the year.

025710JanFebMarAprMayJunJulAugSepOctNovDecModerateHighVery highExtremeVery highHighModerateAug 10UV 10Jan 1UV 2
UV index (midday)Level
Jan2Moderate
Feb4Moderate
Mar5Moderate
Apr7High
May8Very high
Jun9Very high
Jul10Very high
Aug10Extreme
Sep8Very high
Oct6High
Nov4Moderate
Dec2Moderate

Air quality in Futtsu in August

GoodModeratePoorUnhealthyVery unhealthy

Average fine-particle pollution (PM2.5) through the year — so you can see where August falls, not just the annual average.

Air quality in Futtsu is worst in April — around 26 µg/m³ PM2.5 (moderate), about 2.2× the cleanest month (December, 12 µg/m³).

Modeled monthly averages (CAMS reanalysis, 2015–2024).

0102030JanFebMarAprMayJunJulAugSepOctNovDecModerateApr 1525 µg/m³Dec 1612 µg/m³
PM2.5 (µg/m³)Level
Jan14Moderate
Feb25Moderate
Mar23Moderate
Apr26Moderate
May21Moderate
Jun18Moderate
Jul13Moderate
Aug12Moderate
Sep12Moderate
Oct14Moderate
Nov14Moderate
Dec12Good
Location & terrain

Where is Futtsu?

Futtsu sits at 35.3°N, 139.8°E, 5 m above sea level, in Japan. The nearest listed city is Kimitsu, 6.0 km away.

Topography around Futtsu

How much the land rises and falls, and what covers it, within 3, 16 and 80 km of Futtsu.

Within 3 km, the terrain around Futtsu has only modest variations in elevation — a maximum elevation change of 17 m around an average of 2 m above sea level; within 16 km, significant variations in elevation — a maximum elevation change of 378 m; within 80 km, very significant variations in elevation — a maximum elevation change of 1,656 m.

The land around Futtsu is covered by water (62%) within 3 km, water (58%) and trees (23%) within 16 km, and water (46%), trees (26%) and artificial surfaces (20%) within 80 km.

3 km
17 m
16 km
378 m
80 km
1,656 m
treesgrasslandcroplandartificial surfacesbare terrainwater
August weather nearby: Kimitsu 6.0 km · Kisarazu 13 km · Kurihama 14 km · Yokosuka 14 km · Sugita 20 km · Yokohama 20 km · Isogo 21 km · Sodegaura 22 km

Japan travel facts

Travel advisory
Level 1
Exercise Normal Precautions
Power plugs
Type A / B
100 V · 50 / 60 Hz
Prices
≈ 65% of US
price level, 2025
GDP per capita
$35,951
2025
Happiness
6.1 / 10
World Happiness, 2025
Safe drinking water
99%
of population, 2024
Homicide rate
0.2
per 100k, 2023
Road deaths
3.6
per 100k/yr, 2019
Income group
High
World Bank
English
Very low
EF EPI 446
Religion
Shintoism 49%Buddhism 46%other 4%Christianity 1%

Sources: World Bank, US State Department, World Happiness Report, WHO/UNICEF, EF EPI, CIA World Factbook.

Data sources

Temperature, precipitation, cloud, humidity, wind and solar figures are a 1991–2020 climatology for Futtsu (35.3108°, 139.8188°, elevation 5 m), computed from hourly ERA5 reanalysis — contains modified Copernicus Climate Change Service information. Sun figures are astronomical calculations, not observations. City data © GeoNames, CC BY 4.0. Map outlines from Natural Earth (public domain); interactive map © Google. Tropical-cyclone seasons are the published climatological basin seasons (NOAA National Hurricane Center / regional warning centres). Sea temperatures are the NOAA OISST v2.1 1991–2020 monthly climatology (public domain), sampled at the nearest ocean point. UV index is derived from CAMS (Copernicus Atmosphere Monitoring Service) clear-sky UV data — contains modified Copernicus Atmosphere Monitoring Service information. Monthly air-quality (PM2.5) seasonality is from the CAMS EAC4 reanalysis (Copernicus Atmosphere Monitoring Service), scaled to the WHO annual mean where available. Topography is sampled from the Copernicus DEM GLO-90 elevation model (© ESA/Airbus) and ESA WorldCover 2021 land cover (CC BY 4.0).